Customer has propylene gas 4-stage compressor. Vibrations on NDE bearing are slowly rising and now reached dangerously high level (45um). Vibrations at DE, which is rigidly coupled to turbine are low. No bearing temperature changes.
Major component is 1X, no phase changes since train was commissioned 1 year ago. I was suspecting bearing deterioration (1X, no changes on other bearings, gradual vibrations growth), but bearings can't improve (!). Contamination (fouling) will, in theory, produce the same pattern, but shouldn't vectors change?
Lost, need your opinion.
Centrifugal Compressor Vibratation Problem
Re: Centrifugal Compressor Vibratation Problem
